CN206329284U - A kind of dual hermetic seal special buckle oil pipe of metallic elastic - Google Patents

A kind of dual hermetic seal special buckle oil pipe of metallic elastic Download PDF

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Publication number
CN206329284U
CN206329284U CN201621469144.2U CN201621469144U CN206329284U CN 206329284 U CN206329284 U CN 206329284U CN 201621469144 U CN201621469144 U CN 201621469144U CN 206329284 U CN206329284 U CN 206329284U
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CN
China
Prior art keywords
oil pipe
spherical seals
seals face
face
box cupling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201621469144.2U
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Chinese (zh)
Inventor
李太仁
周振强
王本兴
张春生
修瑜
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panjin Liaohe Oil Field Jin Huan Ltd Industrial Co
Original Assignee
Panjin Liaohe Oil Field Jin Huan Ltd Industrial Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panjin Liaohe Oil Field Jin Huan Ltd Industrial Co filed Critical Panjin Liaohe Oil Field Jin Huan Ltd Industrial Co
Priority to CN201621469144.2U priority Critical patent/CN206329284U/en
Application granted granted Critical
Publication of CN206329284U publication Critical patent/CN206329284U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a kind of dual hermetic seal special buckle oil pipe of metallic elastic, described oil pipe body one end sets external screw thread, the other end sets welding groove, external screw thread one end is provided with the oil pipe body, it is additionally provided with body Spherical Seals face, the cusp of the body Spherical Seals face and tube end torque shoulder is apart from L1=29.00mm 29.10mm, the body Spherical Seals face with and its box cupling Spherical Seals face 9 being used in combination be used in combination, the cusp of the box cupling Spherical Seals face and coupling end torque shoulder is apart from L2=28.90mm 29.00mm, and L1 L2≤0.05mm.The utility model ball face sealing can be to realize elastic packing in the range of greater angle, ball face sealing structure can offset external moment of torsion on axial direction, radial direction are multi-direction, overload-resistant moment of torsion effect can be functioned well as, while easy structure is also in industrially promotion and application.

Description

A kind of dual hermetic seal special buckle oil pipe of metallic elastic
Technical field
The utility model belongs to oil exploitation drilling equipment technical field, is related to the tubing round thread connection skill of drilling equipment Art, more particularly to a kind of dual hermetic seal special buckle oil pipe of metallic elastic.
Background technology
With the development and the progress of science and technology of social economy, people are more and more stronger to the dependence of petroleum-based energy.This Promote the exploitation of underground deep layer petroleum resources, tubing and casing is indispensable special tubing during oil gas drilling, its Quality directly influences the success or failure of drilling operation and the life-span of Oil/gas Well.And nipple with oil casing together in oil gas It is long-term in well bear to stretch, compress, bend, the test of the combined stress of generation such as internal pressure, external pressure and temperature, it is most thin in tubing and casing Weak part is exactly threaded connection place, and the quality of thread quality directly affects the life-span of Oil/gas Well.Through investigation, external tubing and casing Failure accidents about 64% occur in threaded connection place, it is domestic then be up to 86%.
The oil bushing threaded connector of API standard is the most frequently used oil sleeve joint of China, is also each tubing and casing production of China The leading products of factory, this product technology is ripe, it is easy to process.But, the oil sleeve joint still suffers from some in structure and consolidated Some defects, such as seal that unreliable, resistance to torsion is low and the easy thread gluing of screw thread, limit the use of API tubing and casings.
In the evolution of petroleum industry, with casinghead gas drilling operation to bigger well depth, higher pressure and temperature, more The direction of harsh working condition is developed and the oil drilling technology technology progress of itself, the conventional API standard of oil pipes Nipple has been difficult to the exploitation requirement for meeting oil field.Although API round threads have the excellent sealing property of comparison, its threaded portion The bonding strength divided is but only equivalent to the 60%~80% of body portion, and API buttress threads are although threaded portion connection is strong Degree is higher, but sealing property is undesirable.So, major oil pipes manufactories of the world are devoted to exploitation bonding strength and close The more superior special screw-threaded oil well pipes of sealing property.
Reduction year by year with the world to the drastically soaring and oil allowable exploitation of fossil energy demand, current oil exploitation The direction of extraction of field forward direction deep-well, ultradeep well, high-pressure oil-gas well, thick oil thermal extraction, directional well etc. progressively develops, thus to stone Sealing between oil pipe and pipe proposes increasingly harsher technical requirements.API (American Petroleum Institute (API)) marks largely used in the past Director circle screw thread and buttress thread joint are unable to meet mining environment bar in terms of gas tightness, bonding strength and resistance to torsion The demand of the severe Oil/gas Well of part.People are forced to go to research and develop the relatively reliable special thread oil pipe of performance.
Utility model content
The purpose of this utility model is to provide a kind of dual hermetic seal special buckle oil pipe of metallic elastic, improves screw thread and connection The structure at place, improves sealing and torsional property, the oil gas hole condition for making it more adapt to harsh environmental conditions.
To realize the purpose of this utility model, the utility model provides a kind of dual hermetic seal special buckle oil of metallic elastic Pipe, it is characterised in that described one end of oil pipe body 1 sets external screw thread 2, the other end is set on welding groove, the oil pipe body 1 The one end of external screw thread 2 is provided with, body Spherical Seals face 3, the body Spherical Seals face 3 and tube end torque shoulder 5 is additionally provided with Cusp apart from L1=29.00mm-29.10mm, the body Spherical Seals face 3 with and its box cupling ball-type for being used in combination it is close Front cover 9 is used in combination, and the cusp of the box cupling Spherical Seals face 9 and coupling end torque shoulder 10 is apart from L2=28.90mm- 29.00mm, and L1-L2≤0.05mm.
Wherein, the circular arc r=11.50mm-12.00mm in the body Spherical Seals face, the box cupling Spherical Seals face circle Arc R=12.00mm-12.50mm, and R-r >=0.20mm.
Wherein, body Spherical Seals face coordinates with box cupling Spherical Seals face with Elastic Circular arc formula metal interference is combined into, and mistake The amount of being full of=0.02-0.20mm.
Compared with prior art, the beneficial effects of the utility model are, the sphere compared with the simple conical surface seal of prior art Sealing can be to realize elastic packing in the range of greater angle, ball face sealing structure can offset outer on axial direction, radial direction are multi-direction Carry out moment of torsion, overload-resistant moment of torsion effect can be functioned well as, while easy structure is also in industrially promotion and application.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of the utility model body male end.
Fig. 3 is the structural representation at the utility model coupling inner thread end.
Fig. 4 is the enlarged diagram of the utility model helicitic texture.
In figure, 1- oil pipe bodys, 2- external screw threads, 3- body Spherical Seals face, 4- body conical surface seals face, 5- tube ends are turned round Square shoulder, 6- box cuplings, 7- internal threads, 8- box cupling stress relief grooves, 9- box cupling Spherical Seals face, 10- box cupling conical surface seals face, 11- coupling end torque shoulders, Q- carrying face angles, D- is oriented to bore hole cone angle, P- pitch, G- height of threads, body ball in face angle, C- Type sealing surface circular arc r, box cupling Spherical Seals face circular arc R.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.It should be appreciated that this place The specific embodiment of description only to explain the utility model, is not used to limit the utility model.
It should be noted that " connection " described herein and the word for expressing " connection ", such as " being connected ", " connected " etc., was both directly connected to including a certain part with another part, also passed through miscellaneous part and another portion including a certain part Part is connected.
It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative Be also intended to include plural form, additionally, it should be understood that, when in this manual using belong to "comprising" and/or " bag Include " when, it indicates existing characteristics, step, operation, part or module, component and/or combinations thereof.
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase Mutually combination.
As Figure 1-Figure 4, this application provides a kind of dual hermetic seal special buckle oil pipe of metallic elastic, the oil pipe pipe The one end of body 1 sets external screw thread 2, and the other end to set and be provided with the one end of external screw thread 2 on welding groove, the oil pipe body 1, is additionally provided with The cusp of body Spherical Seals face 3, the body Spherical Seals face 3 and tube end torque shoulder 5 is apart from L1=29.00mm- 29.10mm, the body Spherical Seals face 3 with and its box cupling Spherical Seals face 9 being used in combination be used in combination, it is described to connect The cusp of Spherical Seals face 9 and coupling end torque shoulder 10 is bound round apart from L2=28.90mm-29.00mm, and L1-L2≤0.05mm.
Wherein, the circular arc r=11.50mm-12.00mm in the body Spherical Seals face 3, the box cupling Spherical Seals face 9 Circular arc R=12.00mm-12.50mm, and R-r >=0.20mm.
Wherein, body Spherical Seals face 3 coordinates with box cupling Spherical Seals face 9 with Elastic Circular arc formula metal interference is combined into, and The magnitude of interference=0.02-0.20mm.
Above-mentioned structure, application can be combined with description scheme, can be played a multiplier effect in addition.
The outside of 1 upper tube body Spherical Seals face of oil pipe body 3 is provided with tube end torque shoulder 5;What box cupling 6 was provided with connects The inner side of hoop internal thread 7 is sequentially provided with box cupling stress relief grooves 8, box cupling Spherical Seals face 9, box cupling conical surface seal face 10, coupling end Torque shoulder 11.
In the application, external screw thread 2 and internal thread 6 use new partially trapezoidal tapered tread, its pitch P be set as 6-8 teeth/ In, thread crest is parallel to tubing bus;
In the application, carrying face angle (Q) setting of the partially trapezoidal tapered tread and the clockwise direction angle of vertical plane Between 3 °~3.5 °, it is oriented to face angle (D) and is set between 10 ° -12 °, interior bore hole cone angle (C) is set between 5 ° -10 °, spiral shell The high G of line tooth is 1.7mm~1.8mm;
In the application, the nominal outside diameter 60.32mm of oil pipe body 1~73.03mm.
The above is only preferred embodiment of the present utility model, it is noted that for the general of the art For logical technical staff, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these change Enter and retouch and also should be regarded as protection domain of the present utility model.

Claims (3)

1. a kind of dual hermetic seal special buckle oil pipe of metallic elastic, it is characterised in that described oil pipe body (1) one end sets outer spiral shell Line (2), the other end to set and be provided with external screw thread (2) one end on welding groove, the oil pipe body (1), is additionally provided with body ball-type The cusp of sealing surface (3), the body Spherical Seals face (3) and tube end torque shoulder (5) is apart from L1=29.00mm- 29.10mm, the body Spherical Seals face (3) with and its box cupling Spherical Seals face (9) being used in combination be used in combination, institute The cusp of box cupling Spherical Seals face (9) and coupling end torque shoulder (10) is stated apart from L2=28.90mm-29.00mm, and L1-L2 ≤0.05mm。
2. a kind of dual hermetic seal special buckle oil pipe of metallic elastic according to claim 1, it is characterised in that the body The circular arc r=11.50mm-12.00mm, box cupling Spherical Seals face (9) circular arc R=12.00mm- in Spherical Seals face (3) 12.50mm, and R-r >=0.20mm.
3. a kind of dual hermetic seal special buckle oil pipe of metallic elastic according to claim 1, it is characterised in that body ball-type Sealing surface (3) coordinates with box cupling Spherical Seals face (9) with Elastic Circular arc formula metal interference is combined into, and the magnitude of interference=0.02- 0.20mm。
CN201621469144.2U 2016-12-29 2016-12-29 A kind of dual hermetic seal special buckle oil pipe of metallic elastic Expired - Fee Related CN206329284U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201621469144.2U CN206329284U (en) 2016-12-29 2016-12-29 A kind of dual hermetic seal special buckle oil pipe of metallic elastic

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201621469144.2U CN206329284U (en) 2016-12-29 2016-12-29 A kind of dual hermetic seal special buckle oil pipe of metallic elastic

Publications (1)

Publication Number Publication Date
CN206329284U true CN206329284U (en) 2017-07-14

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CN201621469144.2U Expired - Fee Related CN206329284U (en) 2016-12-29 2016-12-29 A kind of dual hermetic seal special buckle oil pipe of metallic elastic

Country Status (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111426261A (en) * 2020-04-22 2020-07-17 湖南工学院 System and method for detecting geometric shape of external thread of special buckle
CN111504170A (en) * 2020-04-26 2020-08-07 湖南工学院 Device for rapidly and precisely detecting thickness of variable-groove-width internal thread and using method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111426261A (en) * 2020-04-22 2020-07-17 湖南工学院 System and method for detecting geometric shape of external thread of special buckle
CN111426261B (en) * 2020-04-22 2021-11-23 湖南工学院 System and method for detecting geometric shape of external thread of special buckle
CN111504170A (en) * 2020-04-26 2020-08-07 湖南工学院 Device for rapidly and precisely detecting thickness of variable-groove-width internal thread and using method thereof

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GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20170714

Termination date: 20191229